C#请求API数据

1. 后台发出Http 请求
   1. Get无参请求

//1.创建url

   var url = "网址";

//2.天加链接

   HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

//3.创建一个响应，存储请求获取的响应， 响应=请求获取的响应

   HttpWebResponse response = (HttpWebResponse)request.GetResponse();

//4.创建一个变量，接收响应的数据

   var responseText = response.GetResponseStream();

//5.使用流读取信息，并赋值给一个变量

   var text = new StreamReader(responseText).ReadToEnd();

1. Get有参请求

var url = "网址

?page=1&rows=10&sort=indexs&SearchName=";

var postDate = "page=1&rows=10&sort=indexs&SearchName=";

HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);

request.Method = "get";

HttpWebResponse response = (HttpWebResponse) request.GetResponse();

var text = response.GetResponseStream();

var sr=new StreamReader(text).ReadToEnd();

1. Post有参提交

   1.创建请求连接

Var url="http://www.leadnt.com/recepticle.aspx";

      var request = (HttpWebRequest)WebRequest.Create();

   2.添加参数

        var postData = "thing1=hello";

        postData += "&thing2=world";

  3.将参数转换编码格式

        var data = Encoding.ASCII.GetBytes(postData);

  4.设置属性

        request.Method = "POST";

        request.ContentType = "application/x-www-form-urlencoded";

        request.ContentLength = data.Length;

  5.将转换后的参数以文件流的形式写入到请求中

        using (var stream = request.GetRequestStream())

        {

          stream.Write(data, 0, data.Length);

        }

  6.声明变量，获取响应

        var response = (HttpWebResponse)request.GetResponse();

  7.以文件流的方式读取响应结果

   var responseString =

 new StreamReader(response.GetResponseStream()).ReadToEnd();